Hamilton Health Impact
Hamilton averaged 8.2 ug/m3 PM2.5, equal to 1.6x the WHO annual PM2.5 guideline and about 0.4 cigarettes per day by the simple AQI Now indicator. The page uses OpenAQ-derived daily history for 5 mapped monitoring locations in Ontario, Canada.
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Average EPA AQI
40
Rank 20 of 158 cities by average AQI
PM2.5
8.2
ug/m3 annualized city average
Seasonality
August
Cleanest: November
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Hamilton
42
42
32
33
44
41
42
46
45
35
31
45
What this health page measures
Translate PM2.5 exposure into WHO exceedance and a simple cigarette-equivalent indicator.
For Hamilton, the current global analytics build covers 367 daily rows from 2024-01-01 to 2025-01-01. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.